JPS6388306A - Hydraulic device for vehicle - Google Patents
Hydraulic device for vehicleInfo
- Publication number
- JPS6388306A JPS6388306A JP61234213A JP23421386A JPS6388306A JP S6388306 A JPS6388306 A JP S6388306A JP 61234213 A JP61234213 A JP 61234213A JP 23421386 A JP23421386 A JP 23421386A JP S6388306 A JPS6388306 A JP S6388306A
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- hydraulic clutch
- clutch device
- control valve
- clutch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010720 hydraulic oil Substances 0.000 claims description 19
- 239000003921 oil Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Arrangement Of Transmissions (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、トラクタ等の車輌における油圧装置に関する
。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a hydraulic system for a vehicle such as a tractor.
（従来の技術）
例えば、トラクタでは、走行系に、油圧クラッチ式前後
進切換装置が備えられると共に、ライブＰＴＯ系にＰＴ
Ｏ油圧クラッチ装置が備えられたものがある。(Prior art) For example, in a tractor, the traveling system is equipped with a hydraulic clutch-type forward/reverse switching device, and the live PTO system is equipped with a PT.
Some are equipped with a hydraulic clutch device.
（発明が解決しようとする問題点）
上記のものでは、一般的には、前後進切換装置とＰＴＯ
油圧クラッチ装置に夫々油圧油を供給する２台の油圧ポ
ンプが備えられるが、これでは、油圧装置が高価なもの
となると云う問題がある。(Problems to be Solved by the Invention) In the above-mentioned devices, generally, the forward/reverse switching device and the PTO
Two hydraulic pumps are provided to supply hydraulic oil to each hydraulic clutch device, but this poses a problem in that the hydraulic device becomes expensive.
そこで、２台の油圧ポンプを単一とすることが考えられ
るが、このようにすると、油圧ポンプと、前後進切換装
置及びＰＴＯ油圧クラッチ装置との間に、優先弁を介装
して、一方の装置に一定量の油圧油を優先的に供給する
必要が生じる。Therefore, it is conceivable to use two hydraulic pumps as a single unit, but in this case, a priority valve is interposed between the hydraulic pump, the forward/reverse switching device, and the PTO hydraulic clutch device, and one It becomes necessary to preferentially supply a certain amount of hydraulic oil to the equipment.
而して、上記のようにすると、優先弁は高価であって、
油圧装置のコストをあまり下げることができないと共に
、優先弁はかなりの熱量発生源であって、優先弁が油温
を上昇させると云う問題が発生する。However, if the above method is used, the priority valve is expensive and
In addition to not being able to reduce the cost of the hydraulic system much, the priority valve is a considerable heat generating source, and the problem arises that the priority valve increases the oil temperature.
又、優先弁の分流性能のばらつきで、前後進切換装置及
びＰＴＯ油圧クラッチ装置の作動に支障が生じると云う
問題も発生する。Further, a problem arises in that the operation of the forward/reverse switching device and the PTO hydraulic clutch device is hindered due to variations in the flow diversion performance of the priority valve.
本発明は上記問題を解決できる車輌における油圧装置を
提供することを目的とする。An object of the present invention is to provide a hydraulic system for a vehicle that can solve the above problems.
（問題点を解決するための手段）
上記目的を達成するために、本発明の特徴とする処は、
第１・第２油圧クラッチ装置７，１２が備えられ、各油
圧クラッチ装置７，１２は、油圧クラッチ２、１３．１
４と、その油圧制御弁８，１５とを有するものにおいて
、
両部圧クラッチ装置７，１２に油圧油を供給する単一の
油圧ポンプ２１と、油圧ポンプ２１と両部圧クラッチ装
置７．１２間に介装される方向制御弁２２とが備えられ
、方向制御弁２２は、油圧ポンプ２１、第１油圧クラッ
チ装置７及び第２油圧クラッチ装置１２とを上記の順で
直列に接続する第１位置と、油圧ポンプ２１、第２油圧
クラッチ装置１２及び第１油圧クラッチ装置７を上記の
順で直列に接続する第２位置とに切換自在とされ、方向
制御弁２２を第１位置に付勢する手段と、第２油圧クラ
ッチ装置１２の接続操作時においてその供給される油圧
油圧力が接続体勢時の圧力と略同一になった際に方向制
御弁２２を第１位置から第２位置に切換える制御手段と
が備えられた点にある。(Means for solving the problems) In order to achieve the above object, the features of the present invention are as follows:
First and second hydraulic clutch devices 7, 12 are provided, and each hydraulic clutch device 7, 12 includes a hydraulic clutch 2, 13.1.
4 and its hydraulic control valves 8, 15, a single hydraulic pump 21 that supplies hydraulic oil to the double-pressure clutch devices 7, 12, and a hydraulic pump 21 and double-pressure clutch device 7.12. A directional control valve 22 interposed therebetween is provided, and the directional control valve 22 connects the hydraulic pump 21, the first hydraulic clutch device 7, and the second hydraulic clutch device 12 in series in the above order. position and a second position in which the hydraulic pump 21, the second hydraulic clutch device 12, and the first hydraulic clutch device 7 are connected in series in the above order, and the directional control valve 22 is biased to the first position. and means for switching the directional control valve 22 from the first position to the second position when the supplied hydraulic oil pressure becomes substantially the same as the pressure when the second hydraulic clutch device 12 is in the connected position. and control means.
（作 用）
第１・第２各油圧クラッチ装置７，１２の油圧クラッチ
２．１３．１４が切断体勢にある時を初期体勢とすると
、この時には、方向制御弁２２は第１位置にあり、油圧
ポンプ２１、第１油圧クラッチ装置７、第２油圧クラッ
チ装置１２が上記の順で直列に接続されている。(Function) If the initial position is when the hydraulic clutches 2, 13, and 14 of the first and second hydraulic clutch devices 7, 12 are in the disconnection position, at this time, the directional control valve 22 is in the first position, The hydraulic pump 21, the first hydraulic clutch device 7, and the second hydraulic clutch device 12 are connected in series in the above order.
上記初期体勢から、第１油圧クラッチ装五７の油圧制御
弁８をクラッチ接続位置に操作すれば、油圧ポンプ２１
からの油圧油が第１油圧クラッチ装置７の油圧クラッチ
２に供給されて、油圧クラッチ２は接続体勢となる。From the above initial position, if the hydraulic control valve 8 of the first hydraulic clutch device 57 is operated to the clutch connecting position, the hydraulic pump 21
Hydraulic oil is supplied to the hydraulic clutch 2 of the first hydraulic clutch device 7, and the hydraulic clutch 2 is placed in a connected position.
次に、上記状態で、第２油圧クラッチ装置１２の油圧制
御弁１５をクラッチ接続位置に操作すれば、第１油圧ク
ラッチ装置７からのドレン油が第２油圧クラッチ装置１
２の一方の油圧クラッチ１３．１４に供給されて、一方
の油圧クラッチ１３．１４が接続体勢となると共に、方
向制御弁２２が第２位置に切換えられて、油圧ポンプ２
１、第２油圧クラッチ装置１２、第１油圧クラッチ装置
７が上記の順で直列に接続される。Next, in the above state, when the hydraulic control valve 15 of the second hydraulic clutch device 12 is operated to the clutch connecting position, the drain oil from the first hydraulic clutch device 7 is transferred to the second hydraulic clutch device 1.
2, the one hydraulic clutch 13.14 is in the connected position, and the directional control valve 22 is switched to the second position, so that the hydraulic pump 2
1, the second hydraulic clutch device 12, and the first hydraulic clutch device 7 are connected in series in the above order.
又、第１・第２油圧クラッチ装置７，１２の上記初期体
勢時から、第２油圧クラッチ装置１２の油圧制御弁１５
をクラッチ接続位置に操作すれば、第２油圧クラッチ装
置１２の一方の油圧クラッチ１３．１４に、油圧ポンプ
２１から第１油圧クラッチ装置７を介して油圧油が供給
されて、一方の油圧クラッチ１３，１４が接続体勢にな
ると共に、方向制御弁２２は第２位置となる。Further, from the above-mentioned initial position of the first and second hydraulic clutch devices 7 and 12, the hydraulic control valve 15 of the second hydraulic clutch device 12
When operated to the clutch connection position, hydraulic oil is supplied from the hydraulic pump 21 to the first hydraulic clutch device 7 to one of the hydraulic clutches 13, 14 of the second hydraulic clutch device 12, and the one hydraulic clutch 13. , 14 are in the connected position, and the directional control valve 22 is in the second position.
次に、上記状態で、第１油圧クラッチ装置７の方向制御
弁８をクラッチ接続位置に操作すれば、第２油圧クラッ
チ装置１２のドレン油が第１油圧クラッチ装置７の油圧
クラッチ２に供給されて、油圧クラッチ２は接続体勢と
なる。Next, in the above state, if the direction control valve 8 of the first hydraulic clutch device 7 is operated to the clutch connecting position, the drain oil of the second hydraulic clutch device 12 is supplied to the hydraulic clutch 2 of the first hydraulic clutch device 7. Then, the hydraulic clutch 2 is in the connected position.
（実施例）
以下、本発明をトラクタに通用した一実施例を図面に基
き説明すれば、第２図はトラクタの伝動系を示すもので
、１はエンジンであり、このエンジン１に、ライブＰＴ
Ｏ系として、ＰＴＯ油圧クラッチ２、ＰＴＯ変速装置３
が、上記の順で直列に接続され、ＰＴＯ変速装置３はＰ
ＴＯ軸２４と連動している。(Embodiment) An embodiment in which the present invention is applied to a tractor will be described below with reference to the drawings. Fig. 2 shows the transmission system of the tractor, and 1 is an engine.
As O system, PTO hydraulic clutch 2, PTO transmission 3
are connected in series in the above order, and the PTO transmission 3 is
It is linked with the TO axis 24.
又、エンジン１には、走行系として、主クラッチ４、油
圧クラッチ式前後進切換装置５、走行変速装置６が上記
の順で直列に接続され、走行変速装置６は後輪等と連動
している。Further, as a driving system, a main clutch 4, a hydraulic clutch type forward/reverse switching device 5, and a traveling transmission 6 are connected in series in the above order to the engine 1, and the traveling transmission 6 is connected in conjunction with the rear wheels, etc. There is.
第３図は第１油圧クラッチ装置７を示すもので、上記Ｐ
ＴＯ油圧クラッチ２、その油圧制御弁８、絞り弁９、リ
リーフ弁１０等から構成されている。FIG. 3 shows the first hydraulic clutch device 7.
It is composed of a TO hydraulic clutch 2, its hydraulic control valve 8, a throttle valve 9, a relief valve 10, and the like.
ＰＴＯ油圧クラッチ２はブレーキ１１付きとされている
。油圧制御弁８は、５ボ一ト３位置切換弁とされ、クラ
ッチ切断位置と、クラッチ接続位置との間に半クラッチ
位置を有する。絞り弁９は油圧制御弁日ぺの供給油路を
絞っている。The PTO hydraulic clutch 2 is equipped with a brake 11. The hydraulic control valve 8 is a five-bottom, three-position switching valve, and has a half-clutch position between a clutch disengagement position and a clutch engagement position. The throttle valve 9 throttles the supply oil path of the hydraulic control valve HIPE.
第４図は第２油圧クラッチ装置１２を示すもので、前後
進切換装置５の前進油圧クラッチ１３及び後進油圧クラ
ッチ１４、その油圧制御弁１５、逆止弁１６付。FIG. 4 shows the second hydraulic clutch device 12, which includes a forward hydraulic clutch 13 and a reverse hydraulic clutch 14 of the forward/reverse switching device 5, a hydraulic control valve 15, and a check valve 16.
き可変絞り弁１７、圧力調整弁１８、リリーフ弁１９等
から構成されている。It is composed of a variable throttle valve 17, a pressure regulating valve 18, a relief valve 19, etc.
前・後進各油圧クラッチ１３．１４は選択的に一方が接
続されるもので、各油圧クラッチ１３．１４の接続時に
、前後進切換装置５は前・後進各体勢とされる。One of the forward and reverse hydraulic clutches 13.14 is selectively connected, and when each of the hydraulic clutches 13.14 is connected, the forward and backward travel switching device 5 is placed in the forward and reverse travel positions.
油圧制御弁１５は５ポ一ト３位置切換弁とされ、前・後
進各油圧クラッチ接続位置と、中立位置とを有する。The hydraulic control valve 15 is a 5-point/3-position switching valve, and has forward and reverse hydraulic clutch engagement positions and a neutral position.
圧力調整弁１８は外部パイロットと内部パイロットを有
するもので、外部パイロットとして、そのバランスピス
トン２０に、油圧制御弁１５の出口側ボートの一つから
の油圧油が、可変絞り弁１７を通って作用する。The pressure regulating valve 18 has an external pilot and an internal pilot, and as the external pilot, hydraulic oil from one of the outlet boats of the hydraulic control valve 15 acts on its balance piston 20 through the variable throttle valve 17. do.
尚リリーフ弁１０を通った油圧油の一部は前後進切換装
置５の潤滑油に使用されるが、潤滑油として使用しない
場合もある。A portion of the hydraulic oil that has passed through the relief valve 10 is used as lubricating oil for the forward/reverse switching device 5, but may not be used as lubricating oil.
第１図は油圧装置全体を示す概略図で、第１図において
、２１は単一の油圧ポンプで、この油圧ポンプ２１によ
り、油圧油が方向制御弁２２を介して第１・第２両油圧
クラッチ装置７，１２に供給される。FIG. 1 is a schematic diagram showing the entire hydraulic system. In FIG. 1, 21 is a single hydraulic pump, and this hydraulic pump 21 supplies hydraulic oil to both the first and second hydraulic systems via a directional control valve 22. It is supplied to clutch devices 7 and 12.
方向制御弁２２は６ボ一ト２位置切換弁タイプとされ、
油圧ポンプ２に第１油圧クラッチ装置７及び第２油圧ク
ラッチ装置１２を上記の順で直列に接続する第１位置（
第１図の方向制御弁２２の右側位置）と、油圧ポンプ２
１、第２油圧クラッチ装置１２及び第１油圧クラッチ装
置７を上記の順で直列に接続する第２位置（第１図の方
向制御弁２２の左側位置）とに切換自在とされている。The directional control valve 22 is a 6-point, 2-position switching valve type,
A first position where the first hydraulic clutch device 7 and the second hydraulic clutch device 12 are connected in series to the hydraulic pump 2 in the above order (
1) and the hydraulic pump 2
1, the second hydraulic clutch device 12 and the first hydraulic clutch device 7 are connected in series in the above order (the position to the left of the direction control valve 22 in FIG. 1).
方向制御弁２２は、付勢バネ２３により、第１位置に付
勢されると共に、第２油圧クラッチ装置１２への供給油
路の油圧油圧力が外部バイロフトとして作用し、上記油
圧油圧力が、第２油圧クラッチ装置１２の接続体勢時の
圧力と同−又は略同一になった際に、方向制御弁２２が
第２位置に切換えられる。The direction control valve 22 is biased to the first position by the biasing spring 23, and the hydraulic pressure in the supply oil path to the second hydraulic clutch device 12 acts as an external biloft, and the hydraulic pressure is The directional control valve 22 is switched to the second position when the pressure becomes the same or substantially the same as the pressure when the second hydraulic clutch device 12 is in the connected position.
尚、上記切換時の圧力は、例えば、１７に＋ｒｆ／ｃｄ
とされる。In addition, the pressure at the time of the above switching is, for example, 17+rf/cd.
It is said that
上記のように構成した実施例によれば、今、第１油圧ク
ラッチ装置７のＰＴＯ油圧クラッチ２が切断体勢にあり
、又、第２油圧クラッチ装置１２の前・後進各油圧クラ
ッチ１３．１４も切断体勢にある時を初期体勢とすると
、この時には、方向制御弁２２は付勢バネ２３により第
１位置にある。According to the embodiment configured as described above, the PTO hydraulic clutch 2 of the first hydraulic clutch device 7 is now in the disconnection position, and the forward and reverse hydraulic clutches 13 and 14 of the second hydraulic clutch device 12 are also in the disengaged position. Assuming that the cutting position is the initial position, the directional control valve 22 is at the first position due to the biasing spring 23 at this time.
従って、油圧ポンプ２１、第１油圧クラッチ装五７、第
２油圧クラッチ装五１２は、上記の順で直列に接続され
、油圧ポンプ２１からの油圧油は上記の順で流れる。Therefore, the hydraulic pump 21, the first hydraulic clutch device 57, and the second hydraulic clutch device 12 are connected in series in the above order, and the hydraulic oil from the hydraulic pump 21 flows in the above order.
上記初期体勢から、第１油圧クラッチ装置７の油圧制御
弁８をクラッチ切断位置から半クラッチ位置を介してク
ラッチ接続位置に操作すれば、油圧ポンプ２１からの油
圧油が油圧制御弁８を介してＰＴＯ油圧クラッチ２に供
給されて、ＰＴＯ油圧クラッチ２はスムーズに接続体勢
となる。From the above-mentioned initial position, if the hydraulic control valve 8 of the first hydraulic clutch device 7 is operated from the clutch disengaged position to the clutch engaged position via the half-clutch position, the hydraulic oil from the hydraulic pump 21 flows through the hydraulic control valve 8. The power is supplied to the PTO hydraulic clutch 2, and the PTO hydraulic clutch 2 smoothly assumes the connecting position.
この場合において、第２油圧クラッチ装置１２の前・後
進各油圧クラッチ１３．１４は切断体勢にあって、ＰＴ
Ｏ油圧クラッチ２に供給される油圧油圧力は前・後進油
圧クラッチ１３．１４による影響を何に半クラッチ状態
とすることができ、ＰＴＯ軸２４と連動する作業機の駆
動部のインチング操作を容易且つ良好に行える。In this case, the forward and reverse hydraulic clutches 13, 14 of the second hydraulic clutch device 12 are in the disconnection position, and the PT
The hydraulic pressure supplied to the O-hydraulic clutch 2 can be kept in a half-clutch state regardless of the influence of the forward and reverse hydraulic clutches 13 and 14, and facilitates the inching operation of the drive unit of the working machine linked to the PTO shaft 24. And it can be done well.
次に、第１油圧クラッチ装置７０ＰＴＯ油圧クラッチ２
を接続体勢にした状態で、第２油圧クラッチ装置工２の
油圧制御弁１５を中立位置から前進位置又は後進位置に
操作すると、第１油圧クラッチ装置７からの低圧のドレ
ン油が第２油圧クラッチ装置１２の前進油圧クラッチ１
３又は後進油圧クラッチ１４の一方に供給される。Next, the first hydraulic clutch device 70PTO hydraulic clutch 2
When the hydraulic control valve 15 of the second hydraulic clutch device 2 is operated from the neutral position to the forward or reverse position with the device in the connected position, the low pressure drain oil from the first hydraulic clutch device 7 flows into the second hydraulic clutch. Forward hydraulic clutch 1 of device 12
3 or reverse hydraulic clutch 14.
そして、この供給された油圧油の一部が可変絞り弁１７
を介して、圧力調整弁１８のバランスピストン２０に作
用する。Then, a part of this supplied hydraulic oil is transferred to the variable throttle valve 17.
via which it acts on the balance piston 20 of the pressure regulating valve 18.
この場合、供給される油圧油圧力が低圧であることから
、油圧制御弁１５の操作により、前・後進油圧クラッチ
１３．１４の一方に供給される油圧油圧力を所望に昇圧
できて、上記一方の油圧クラッチ１３、１４を容易に半
クラッチ状態とでき、トラクタの前後方向へのインチン
グ動作を容易且つ良好に行える。In this case, since the supplied hydraulic pressure is low, the hydraulic pressure supplied to one of the forward and reverse hydraulic clutches 13 and 14 can be increased to a desired level by operating the hydraulic control valve 15. The hydraulic clutches 13 and 14 of the hydraulic clutches 13 and 14 can be easily brought into a half-clutch state, and the inching operation in the longitudinal direction of the tractor can be performed easily and favorably.
そして、前・後進油圧クラッチ１３．１４の一方に供給
される油圧油の圧力が、クラッチ接続体勢時の圧力と同
−又は略同一となると、方向制御弁２２に作用するパイ
ロット圧が上記圧力となるので、方向制御弁２２が第２
位置に切換わり、油圧ポンプ２工、第２油圧クラッチ装
置１２、第１油圧クラッチ装置７が上記の順で直列に接
続される。When the pressure of the hydraulic oil supplied to one of the forward and reverse hydraulic clutches 13 and 14 becomes the same or approximately the same as the pressure in the clutch engagement position, the pilot pressure acting on the directional control valve 22 becomes equal to the above pressure. Therefore, the direction control valve 22 is
The two hydraulic pumps, the second hydraulic clutch device 12, and the first hydraulic clutch device 7 are connected in series in the above order.
尚、第２油圧クラッチ装置１２の前・後進両油圧クラッ
チ１３．１４を再度切断体勢とすると、方向制御弁２２
に作用するバイロフト圧が低下して、方向制御弁２２は
第１位置に切換わる。Note that when the forward and reverse hydraulic clutches 13 and 14 of the second hydraulic clutch device 12 are set to the disconnected position again, the direction control valve 22
The biloft pressure acting on the directional control valve 22 is switched to the first position.
而して、次に、第１・第２油圧クラッチ装置７゜１２の
上記初期体勢時から、第２油圧クラッチ１２の油圧制御
弁１５を中立位置から前進位置又は後進位置に切換える
と、油圧ポンプ２１からの油圧油が第１油圧クラッチ装
置７を介して前・後進油圧クラッチ１３．１４の一方に
供給されて、一方の油圧クラッチ１３．１４が接続体勢
とされると共に、方向制御弁２２が第２位置に切換えら
れる。Then, when the hydraulic control valve 15 of the second hydraulic clutch 12 is switched from the neutral position to the forward position or reverse position from the above-mentioned initial position of the first and second hydraulic clutch devices 7°12, the hydraulic pump Hydraulic oil from 21 is supplied to one of the forward and reverse hydraulic clutches 13.14 via the first hydraulic clutch device 7, and one of the hydraulic clutches 13.14 is placed in the connected position, and the directional control valve 22 is turned on. switched to the second position.
この場合においても、第２油圧クラッチ装置１２の一方
の油圧クラッチ１３．１４に供給される油圧油圧力は、
第１油圧クラッチ装置７によって何ら影響されず、一方
の油圧クラッチ１３．１４に供給される油圧油圧力を所
望に昇圧できる。Even in this case, the hydraulic oil pressure supplied to one hydraulic clutch 13.14 of the second hydraulic clutch device 12 is
The hydraulic oil pressure supplied to one of the hydraulic clutches 13, 14 can be increased as desired without being influenced in any way by the first hydraulic clutch device 7.
次に、この状態において、第１油圧クラッチ装置７の油
圧制御弁８をクラッチ切断位置からクラッチ接続位置に
操作すれば、第２油圧クラッチ装置１２からの低圧のド
レン油が第１油圧クラッチ装置７のＰＴＯ油圧クラッチ
２に供給されるのであり、この場合においても、ＰＴＯ
油圧クラッチ２に供給される油圧油圧力を所望に昇圧で
きる。Next, in this state, if the hydraulic control valve 8 of the first hydraulic clutch device 7 is operated from the clutch disengaged position to the clutch engaged position, the low pressure drain oil from the second hydraulic clutch device 12 is transferred to the first hydraulic clutch device 7. is supplied to the PTO hydraulic clutch 2, and in this case also, the PTO
The hydraulic pressure supplied to the hydraulic clutch 2 can be increased as desired.
尚、実施例では、ＰＴＯ油圧クラッチとその制御弁等に
より、第１油圧クラッチ装置を構成し、前・後進油圧ク
ラッチとその制御弁等により、第２油圧クラッチ装置を
構成したが、逆に構成してもよい。又、油圧クラッチを
、ＰＴＯ油圧クラッチや前・後進油圧クラッチ以外とし
てもよい。In the embodiment, the first hydraulic clutch device was composed of the PTO hydraulic clutch and its control valve, and the second hydraulic clutch device was composed of the forward and reverse hydraulic clutches and their control valves, but the configuration could be reversed. You may. Further, the hydraulic clutch may be other than a PTO hydraulic clutch or a forward/reverse hydraulic clutch.
（発明の効果）
以上詳述したように、本発明によれば、２つの油圧クラ
ッチを、優先弁を使用することなく、単一の油圧ポンプ
からの油圧油により確実に作動させることができると共
に、各油圧クラッチの接続操作時に、各油圧クラッチに
供給される油圧油圧力を他の油圧クラッチに影響される
ことなく、容易に所望に昇圧できて、容易に半クラッチ
状態とでき、油圧クラッチと連動する部分のインチング
動作を容易且つ良好に行える。又、本発明は、上記のよ
うに油圧ポンプを単一とすると共に、優先弁も使用せず
、その構造は簡易であって、油圧装置ローコストとでき
、実益大である。(Effects of the Invention) As detailed above, according to the present invention, two hydraulic clutches can be reliably operated with hydraulic oil from a single hydraulic pump without using a priority valve. , when each hydraulic clutch is connected, the hydraulic pressure supplied to each hydraulic clutch can be easily increased to the desired level without being influenced by other hydraulic clutches, and can easily be brought into a half-clutch state. Inching operations of interlocking parts can be performed easily and favorably. In addition, the present invention uses a single hydraulic pump as described above, does not use a priority valve, and has a simple structure, resulting in a low-cost hydraulic system, which is highly profitable.
図面は本発明の一実施例を示し、第１図は油圧装置の全
体概略図、第２図はトラクタの伝動系を示すブロック図
、第３図及び第４図の各図は、第１・第２各油圧クラッ
チ装置の回路図である。
２・・・ＰＴＯ油圧クラッチ、７．１２・・・第１・第
２油圧クラッチ装置、８，１５・・・油圧制御弁、１３
．１４・・・前・後進油圧クラッチ、２１・・・油圧ポ
ンプ、２２・・・方向制御弁。The drawings show one embodiment of the present invention; FIG. 1 is an overall schematic diagram of a hydraulic system, FIG. 2 is a block diagram showing a tractor transmission system, and each of FIGS. It is a circuit diagram of each 2nd hydraulic clutch device. 2... PTO hydraulic clutch, 7.12... First and second hydraulic clutch devices, 8, 15... Hydraulic control valve, 13
．． 14... Forward/reverse hydraulic clutch, 21... Hydraulic pump, 22... Directional control valve.
Claims (1)
、各油圧クラッチ装置７、１２は、油圧クラッチ２、１
３、１４と、その油圧制御弁８、１５とを有するものに
おいて、 両油圧クラッチ装置７、１２に油圧油を供給する単一の
油圧ポンプ２１と、油圧ポンプ２１と両油圧クラッチ装
置７、１２間に介装される方向制御弁２２とが備えられ
、方向制御弁２２は、油圧ポンプ２１、第１油圧クラッ
チ装置７及び第２油圧クラッチ装置１２とを上記の順で
直列に接続する第１位置と、油圧ポンプ２１、第２油圧
クラッチ装置１２及び第１油圧クラッチ装置７を上記の
順で直列に接続する第２位置とに切換自在とされ、方向
制御弁２２を第１位置に付勢する手段と、第２油圧クラ
ッチ装置１２の接続操作時においてその供給される油圧
油圧力が接続体勢時の圧力と略同一になった際に方向制
御弁２２を第１位置から第２位置に切換える制御手段と
が備えられたことを特徴とする車輌における油圧装置。(1) First and second hydraulic clutch devices 7 and 12 are provided, and each hydraulic clutch device 7 and 12 is connected to the hydraulic clutch 2 and 1.
3, 14 and their hydraulic control valves 8, 15, the single hydraulic pump 21 supplies hydraulic oil to both hydraulic clutch devices 7, 12, and the hydraulic pump 21 and both hydraulic clutch devices 7, 12. A directional control valve 22 interposed therebetween is provided, and the directional control valve 22 connects the hydraulic pump 21, the first hydraulic clutch device 7, and the second hydraulic clutch device 12 in series in the above order. position and a second position in which the hydraulic pump 21, the second hydraulic clutch device 12, and the first hydraulic clutch device 7 are connected in series in the above order, and the directional control valve 22 is biased to the first position. and means for switching the directional control valve 22 from the first position to the second position when the supplied hydraulic oil pressure becomes substantially the same as the pressure when the second hydraulic clutch device 12 is in the connected position. A hydraulic system for a vehicle, characterized in that it is equipped with a control means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61234213A JPS6388306A (en) | 1986-09-30 | 1986-09-30 | Hydraulic device for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61234213A JPS6388306A (en) | 1986-09-30 | 1986-09-30 | Hydraulic device for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6388306A true JPS6388306A (en) | 1988-04-19 |
Family
ID=16967467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61234213A Pending JPS6388306A (en) | 1986-09-30 | 1986-09-30 | Hydraulic device for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6388306A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0854004A (en) * | 1994-08-10 | 1996-02-27 | Kubota Seiki Kk | Valve system |
-
1986
- 1986-09-30 JP JP61234213A patent/JPS6388306A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0854004A (en) * | 1994-08-10 | 1996-02-27 | Kubota Seiki Kk | Valve system |
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